Aerial work hydraulic walking system and aerial work truck

Abstract

The application discloses a kind of high-altitude operation hydraulic walking system and high-altitude operation vehicle, comprising: control handle, control module, control valve, pump motor, parking brake and walking motor;Control module includes first controller and second controller;Second controller is used to transmit throttle command to pump motor, and second controller is used to adjust the rotating speed of pump motor, to control the start-stop, acceleration or deceleration of whole machine;Control valve is used to control the flow direction of hydraulic oil, and distribute hydraulic oil to walking motor and parking brake.The hydraulic walking system provided by the application cooperates with control module and control valve, to ensure that the vehicle does not appear speed loss and rush slope phenomenon when the tire is suspended in downhill working condition, and to ensure that the vehicle can be quickly braked when the tire is suspended in flat ground working condition, while supplementing hydraulic oil to the low pressure side of the first motor or the second motor can avoid the walking motor from sucking air, making noise and other situations, greatly enhancing the safety of walking.

Description

Technical Field

[0001] This invention relates to the field of hydraulic drive technology, and in particular to a hydraulic walking system and aerial work vehicle for high-altitude operations. Background Technology

[0002] Aerial work platforms, capable of carrying heavy loads, have a wide range of applications, increasingly used in infrastructure, transportation projects, and prefabricated buildings. Consequently, the requirements for overall operator comfort are also gradually increasing. In particular, the hydraulic motor and parking brake of a scissor lift aerial work platform for leveling use the same hydraulic circuit and cannot be controlled independently. Therefore, improving the smoothness of the machine can only be achieved by slowing the motor to a lower speed before engaging the parking brake. Due to the relatively small size of the scissor lift aerial work platform and limitations in cost and space, a floating wheel function cannot be installed, thus the chassis is considered a rigid structure. When traveling on level ground or downhill, if the ground is uneven, one of the drive wheels will inevitably become suspended in the air. If the operator attempts to brake in this situation, the motor's deceleration effect is weakened because the drive wheel is suspended, resulting in a significant reduction in braking force. This leads to increased braking distance on level ground and stalling on downhill slopes, posing a safety hazard. Summary of the Invention

[0003] This invention provides a hydraulic walking system and aerial work vehicle for high-altitude operations. Through the cooperation between the control module (first controller and second controller) and the control valve, the system ensures that the vehicle does not stall and surge uphill when the tires are suspended in the air on a downhill slope. When the tires are suspended in the air on flat ground, the system ensures rapid braking of the vehicle. At the same time, it replenishes hydraulic oil to the low-pressure side of the first or second motor, so that when the walking motor is low on oil, hydraulic oil can be replenished in time, avoiding problems such as air intake and abnormal noise in the walking motor, thus greatly enhancing the safety of walking.

[0004] According to a first aspect of the present invention, a hydraulic walking system for high-altitude operations is provided, comprising: a control handle, a control module, a control valve, a pump motor, a parking brake, and a walking motor; the walking motor includes a first motor and a second motor; the control module includes a first controller and a second controller; The control handle is connected to the input terminal of the first controller, the first output terminal of the first controller is connected to the second controller, and the second output terminal of the first controller is connected to the control valve; the control valve is connected to the travel motor; the parking brake is connected to the control valve, and the parking brake is used to control the whole machine to enter the parking state or release the parking state; The control handle is used to transmit the user's reversing command and throttle command to the first controller. The first controller is used to transmit the reversing command to the control valve to realize the walking reversing of the whole machine. The first controller is used to transmit the throttle command to the second controller. The second controller is connected to the pump motor. The second controller is used to transmit the throttle command to the pump motor. The second controller is used to adjust the speed of the pump motor to control the start, stop, acceleration or deceleration of the whole machine. The control valve is used to control the flow direction of the hydraulic oil and distribute the hydraulic oil to the travel motor and the parking brake.

[0005] Optionally, a hydraulic pump may also be included; The first end of the hydraulic pump is connected to the pump motor, the second end of the hydraulic pump is connected to the control valve, and the third end of the hydraulic pump is connected to the oil tank. The hydraulic pump is used to convert the mechanical energy provided by the pump motor into hydraulic energy and transmit it to the control valve.

[0006] Optionally, the control valve includes a solenoid valve; The first end of the solenoid valve is connected to the hydraulic pump, the second end of the solenoid valve is connected to the oil inlet of the first motor, the third end of the solenoid valve is connected to the oil return port of the second motor, and the fourth end of the solenoid valve is connected to the oil tank. The solenoid valve is used to control the transmission of hydraulic oil to the oil inlet of the first motor or the oil return port of the second motor.

[0007] Optionally, the control valve may further include a balancing valve; The first end of the balance valve is connected to the fourth end of the solenoid valve, the second end of the balance valve is connected to the oil tank, and the third end of the balance valve is connected to the first end of the solenoid valve. The balance valve is used to control the transmission speed of the hydraulic oil.

[0008] Optionally, the control valve may further include a back pressure check valve and a replenishment check valve; The first end of the back pressure check valve is connected to the second end of the balance valve, and the second end of the back pressure check valve is connected to the oil tank. The back pressure check valve is used to control the transmission of hydraulic oil flowing through the solenoid valve to the replenishment check valve. The first end of the replenishing check valve is connected to the second end of the balance valve, and the second end of the replenishing check valve is connected to the common end of the first motor and the second motor. The replenishing check valve is used to transfer the hydraulic oil to the oil inlet of the second motor.

[0009] Optionally, the control valve may further include a main relief valve; The first end of the main relief valve is connected to the first end of the solenoid valve, and the second end of the main relief valve is connected to the oil tank; The main overflow valve is used to control the maximum walking pressure of the entire machine.

[0010] Optionally, the control valve may further include a check valve; The first end of the check valve is connected to the hydraulic pump, and the second end of the check valve is connected to the solenoid valve. The one-way valve is used to transmit the hydraulic oil in one direction to the parking brake and the solenoid valve.

[0011] Optionally, the control valve may further include a damping orifice; The damping orifice is located in the return oil branch of the parking brake; the damping orifice is used to control the return oil speed of the parking brake.

[0012] Optionally, the solenoid valve includes a three-position four-way solenoid directional valve or a three-position six-way solenoid directional valve.

[0013] According to a second aspect of the present invention, an aerial work platform vehicle is provided, comprising a hydraulic walking system for aerial work as described in any one of the first aspects of the present invention.

[0014] This invention discloses a hydraulic walking system and aerial work platform for high-altitude operations, comprising: a control handle, a control module, a control valve, a pump motor, a parking brake, and a travel motor; the travel motor includes a first motor and a second motor; the control module includes a first controller and a second controller; the control handle is connected to the input terminal of the first controller, the first output terminal of the first controller is connected to the second controller, and the second output terminal of the first controller is connected to the control valve; the control valve is connected to the travel motor; the parking brake is connected to the control valve and is used to control the entire machine to enter or release the parking state; the control handle is used to transmit the user's reversing command and throttle command to the first controller, the first controller is used to transmit the reversing command to the control valve to realize the travel reversing of the entire machine; the first controller is used to transmit the throttle command to the second controller; the second controller is connected to the pump motor and is used to transmit the throttle command to the pump motor, and the second controller is used to adjust the speed of the pump motor to control the start, stop, acceleration, or deceleration of the entire machine; the control valve is used to control the flow direction of hydraulic oil and distribute hydraulic oil to the travel motor and the parking brake. The hydraulic walking system and aerial work vehicle provided by this invention, through the cooperation between the control module (first controller and second controller) and the control valve, ensures that the vehicle does not stall and surge uphill when the tires are suspended in the air on a downhill slope; and ensures rapid braking of the vehicle when the tires are suspended in the air on flat ground. At the same time, it replenishes hydraulic oil to the low-pressure side of the first motor or the second motor, so that when the walking motor is low on oil, hydraulic oil can be replenished to the walking motor in a timely manner, avoiding situations such as air intake and abnormal noise in the walking motor, and greatly enhancing the safety of walking.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a hydraulic walking system for high-altitude operations provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the hydraulic walking system for high-altitude operations provided in an embodiment of the present invention. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0021] Figure 1 This is a schematic diagram of a hydraulic walking system for high-altitude operations provided in an embodiment of the present invention. (Refer to...) Figure 1 In existing technologies, the working ground at construction sites is usually not perfectly flat. Since the chassis of the aerial work platform is rigid and the tires have no traction, there will be insufficient tire grip when the road surface is uneven. If braking is needed at this time, only one motor will be involved in deceleration, resulting in poor deceleration and a longer braking distance. This poses a safety hazard. Therefore, to address this technical problem, this invention provides a hydraulic walking system for aerial work, including: a control handle 1, a control module 2, a control valve 3, a pump motor 4, a parking brake 5, and a walking motor 6; the walking motor 6 includes a first motor 61 and a second motor 62; the control module 2 includes a first controller 21 and a second controller 22. The control handle 1 is connected to the input terminal of the first controller 21, the first output terminal of the first controller 21 is connected to the second controller 22, and the second output terminal of the first controller 21 is connected to the control valve 3; the control valve 3 is connected to the travel motor 6; the parking brake 5 is connected to the control valve 3, and the parking brake 5 is used to control the whole machine to enter the parking state or release the parking state. The control handle 1 is used to transmit the user's reversing command and throttle command to the first controller 21. The first controller 21 is used to transmit the reversing command to the control valve 3 to realize the walking reversing of the whole machine. The first controller 21 is used to transmit the throttle command to the second controller 22. The second controller 22 is connected to the pump motor 4. The second controller 22 is used to transmit the throttle command to the pump motor 4. The second controller 22 is used to adjust the speed of the pump motor 4 to control the start, stop, acceleration or deceleration of the whole machine. Control valve 3 is used to control the hydraulic oil ( Figure 1 The hydraulic oil is distributed to the travel motor 6 and the parking brake 5 according to the flow direction (not shown). Specifically, the control handle 1 is electrically connected to the first controller 21. The user can control the first motor 61 and the second motor 62 by adjusting the opening of the control handle 1. The control handle 1 receives the user's reversing command (i.e., to realize the reversing of the machine's travel direction, which is to switch the machine's forward and backward directions) and throttle command (i.e., to realize the machine's start, stop, acceleration or deceleration), and transmits the reversing command and throttle command to the first controller 21. The first controller 21 receives the reversing command and transmits the reversing command to the control valve 3 to switch the machine's movement direction from forward to backward, or from backward to forward. The first controller 21 is also used to transmit the throttle command to the second controller 22. The second controller 22 converts and processes the throttle command and transmits it to the pump motor 4. By adjusting the speed of the pump motor 4, the start, stop, acceleration or deceleration of the machine is controlled. Control valve 3 controls the flow direction of hydraulic oil within the system, transmitting it to the travel motor (to control the operating state of the first motor 61 and the second motor 62) and the parking brake 5 (to control the vehicle to enter or exit the parking state). The hydraulic travel system for aerial work provided by this invention, through the cooperation between the control module (first controller and second controller) and the control valve, ensures that the vehicle does not stall and surge uphill when the tires are suspended in the air during downhill operations; and ensures rapid braking of the vehicle when the tires are suspended in the air on flat ground. Simultaneously, it replenishes hydraulic oil to the low-pressure side of the first or second motor, allowing for timely replenishment of hydraulic oil to the travel motor when it is low on oil, preventing issues such as air intake or abnormal noise, and greatly enhancing travel safety. Optionally, continue to refer to... Figure 1 The hydraulic walking system for high-altitude operations provided in this embodiment of the invention also includes a hydraulic pump 7; The first end of the hydraulic pump 7 is connected to the pump motor 4, the second end of the hydraulic pump 7 is connected to the control valve 3, and the third end of the hydraulic pump 7 is connected to the oil tank 8. The hydraulic pump 7 is used to convert the mechanical energy provided by the pump motor 4 into hydraulic energy and transmit it to the control valve 3.

[0022] Specifically, the pump motor 4 provides power to the hydraulic pump 7. The first end of the hydraulic pump 7 is connected to the pump motor 4, the second end of the hydraulic pump 7 is connected to the control valve 3, and the third end of the hydraulic pump 7 is connected to the oil tank 8. The pump motor 4 converts electrical energy into mechanical energy to provide power to the hydraulic pump 7. The oil tank 8 provides hydraulic oil to the hydraulic pump 7. The hydraulic pump 7 converts the mechanical energy provided by the pump motor 4 into hydraulic energy and transmits the hydraulic oil to the control valve 3. The control valve 3 transmits the hydraulic oil to the first motor 61 and the second motor 62 to achieve the normal operation of the whole machine.

[0023] Optional, Figure 2 This is a schematic diagram of the hydraulic walking system for high-altitude operations provided in an embodiment of the present invention, for reference. Figure 1 and Figure 2 The control valve 3 in the hydraulic walking system for high-altitude operations provided in this embodiment of the invention includes a solenoid valve 31; The first end of the solenoid valve 31 is connected to the hydraulic pump 7, the second end of the solenoid valve 31 is connected to the oil inlet B2 of the first motor 61, the third end of the solenoid valve 31 is connected to the oil return port B1 of the second motor 62, and the fourth end of the solenoid valve 31 is connected to the oil tank 8. Solenoid valve 31 is used to control the transmission of hydraulic oil to the oil inlet B2 of the first motor 61 or the oil return port B1 of the second motor 62.

[0024] Specifically, when the operator pushes down the control handle 1, the control handle 1 inputs the operator's command to the first controller 21. The first controller 21 processes the command and transmits it to the solenoid valve 31 to switch the direction. At the same time, the first controller 21 inputs a signal to the second controller 22, which controls the pump motor 4 to work. Taking the previous driving as an example, when the machine starts and moves, the Y1 position of the solenoid valve 31 is energized. The hydraulic oil enters the solenoid valve 31 through the P port and is divided into two parts: one part flows into the parking brake 5 through the BR port, releasing the parking state of the aerial work platform (brake release); the other part flows out from the B2 port of the solenoid valve 31 to the first motor 61. The first motor 61 rotates, and the return oil from the first motor 61 enters the control valve 3 through the return oil port C2, and then flows out through C1 to the second motor 62, driving the second motor 62 to rotate. The return oil from the second motor 62 flows through B1 and through the solenoid valve 31 back to the oil tank 8, completing the cycle. When the machine turns, the inner motor rotates slowly, while the outer motor rotates quickly. At this time, the outer motor may experience insufficient oil supply, and the motor is prone to sucking in air and making abnormal noises, as well as dry running due to lack of lubrication. At this time, the control valve 3 takes effect, replenishing the hydraulic oil that was before returning to the oil tank 8 to the low-pressure side of the outer motor, avoiding the problem of differential speed sucking in air.

[0025] Optional, continue to refer to Figure 2 The control valve in the hydraulic walking system for high-altitude operations provided in this embodiment of the invention also includes a balance valve 32; The first end of the balance valve 32 is connected to the fourth end of the solenoid valve 31, the second end of the balance valve 32 is connected to the oil tank 8, and the third end of the balance valve 32 is connected to the first end of the solenoid valve. The balance valve 32 is used to control the transmission speed of hydraulic oil.

[0026] Specifically, when the machine is braking normally, the operator releases control handle 1, which automatically returns to its original position (zero angle). At this time, the first controller 21 detects the signal from control handle 1 and sends it to the second controller 22. The second controller 22 then controls the pump motor 4 to decelerate. Simultaneously, the first controller 21 sends a signal to the control valve 3, de-energizing the solenoid valve 31 and returning it to its neutral position. The solenoid valve 31 waits until the pump motor 4 reaches a speed of 0 r / min before de-energizing and returning to its neutral position. During this process, because the pump motor 4 requires time to decelerate, the pressure in the control valve 3 circuit remains for a period of time, so the parking brake 5 remains released. The vehicle speed is reduced by the throttling effect of the balance valve 32, coordinated with the first motor 61 and the second motor 62. When the vehicle speed decreases to a lower value, and the pump motor 4 reaches a speed of 0 r / min, the solenoid valve 31 de-energizes and returns to its original position, and the parking brake 5 slowly releases pressure, completing the parking brake operation.

[0027] Optional, continue to refer to Figure 2 The control valves in the hydraulic walking system for high-altitude operations provided in this embodiment of the invention also include a back pressure check valve and a replenishing oil check valve 34. The first end of the back pressure check valve 33 is connected to the second end of the balance valve 32, and the second end of the back pressure check valve 33 is connected to the oil tank 8. The back pressure check valve 33 is used to control the transmission of hydraulic oil flowing through the solenoid valve 31 to the replenishment check valve 34. The first end of the replenishing check valve 34 is connected to the second end of the balance valve 32, and the second end of the replenishing check valve 34 is connected to the common end of the first motor 61 and the second motor 62. The replenishing check valve 34 is used to transfer hydraulic oil to the inlet of the second motor 62.

[0028] Specifically, the entire process is divided into braking and downhill driving. During braking, if the road surface is uneven and potholes cause one tire to become suspended in the air, there are two possible scenarios: Scenario 1: The first motor 61 is suspended in the air. When the control handle 1 is released, the aerial work platform begins to brake. To ensure smooth braking, the pump motor 4 continues to rotate, and the hydraulic pump 7 continuously supplies oil to the system. At this time, the second motor 62 is in normal contact with the ground. Due to inertia, the entire vehicle drives the second motor 62 to rotate. The second motor 62 can be considered as a pump at this point. The second motor 62 draws away the pressure at port C1, causing the pressure at port C2 to decrease along with the pressure at port C1. Since the first motor 61 is suspended and rotating freely, as the pressure at port C2 decreases, the pressure at port P also decreases, causing the balance valve 32 to tend to close, resulting in a strong throttling effect. The overall speed of the machine rapidly decreases until it comes to a complete stop. During this process, the pressure at port C1 is drawn away by the second motor 62, and the hydraulic fluid before the back pressure check valve 33 is replenished to port C1 (i.e., the low-pressure side / inlet of the second motor 62) through the replenishment check valve 34. This ensures that the second motor 62 does not suck in cavitation fluid.

[0029] In the second scenario: the second motor 62 is suspended in the air. When the control handle 1 is released, the aerial work platform begins to brake. To ensure smooth braking, the pump motor 4 continues to rotate, and the hydraulic pump 7 continues to supply oil to the system. At this time, the first motor 61 is in normal contact with the ground. Due to inertia, the entire vehicle drives the first motor 61 to rotate. The first motor 61 can be regarded as a pump at this time, so the first motor 61 draws away the hydraulic oil from the oil inlet. The pressure in the oil inlet drops rapidly. At this time, the control pressure of the balance valve 32 and the pressure of the parking brake 5 drop rapidly. The balance valve 32 tends to close, producing a strong throttling effect. The speed of the entire machine drops rapidly until it comes to a stop.

[0030] The above ensures that the vehicle can brake effectively and quickly, whether both wheels are in contact with the ground or only one wheel is in contact with the ground.

[0031] When driving downhill, if the road surface is uneven and potholes cause one tire to be suspended in the air, there are two possible scenarios: Scenario 1: During the downhill descent, when the first motor 61 is momentarily suspended in the air, the vehicle tends towards a stalled uphill state. At this moment, the vehicle drives the second motor 62 to rotate. The second motor 62 can be considered as a pump, drawing away the pressure at port C1. The pressure at port C2 drops rapidly along with the pressure at port C1. Since the first motor 61 is suspended and rotating freely, the pressure at port P also decreases accordingly, causing the balance valve 32 to tend to close, resulting in a strong throttling effect and ensuring that the entire machine does not stall during the uphill climb. During the downhill descent, the pressure at port C1 is drawn away by the second motor 62, and the oil before the back pressure check valve 33 is replenished to port C1 (i.e., the low-pressure side / oil inlet of the second motor 62) through the oil replenishment check valve 34. This ensures that the second motor 62 does not suck in cavitation.

[0032] The second scenario: During the downhill process, when the second motor 62 is suspended in the air, the vehicle tends to stall and climb the slope. At this time, the whole vehicle drives the first motor 61 to rotate. The first motor 61 can be regarded as a pump at this time. The first motor 61 draws oil from the oil inlet, and the oil inlet pressure drops rapidly. At this time, the control pressure of the balance valve 32 drops rapidly, the opening of the balance valve 32 decreases, and the balance valve 32 tends to close, producing a strong throttling effect to ensure that the whole machine does not stall and climb the slope.

[0033] Continue to refer to Figure 2 The control valve in the hydraulic walking system for high-altitude operations provided in this embodiment of the invention also includes a main relief valve 35; The first end of the main relief valve 35 is connected to the first end of the solenoid valve 31, and the second end of the main relief valve 35 is connected to the oil tank 8. The main relief valve 35 is used to control the maximum walking pressure of the whole machine.

[0034] Specifically, the main relief valve 35 is located on the branch of the parking brake 5 and is used to control the maximum travel pressure of the whole machine to prevent the safety hazard of damage to system components caused by excessive pressure impact.

[0035] Optional, continue to refer to Figure 2 The control valve in the hydraulic walking system for high-altitude operations provided in this embodiment of the invention also includes a one-way valve 36; The first end of the check valve 36 is connected to the hydraulic pump 7, and the second end of the check valve 36 is connected to the solenoid valve 31. The one-way valve 36 is used to transmit hydraulic oil in one direction to the parking brake 5 and the solenoid valve 31.

[0036] Specifically, a check valve 36 is positioned before the inlet of the solenoid valve 31 to prevent the high-pressure hydraulic oil from back-dragging the rotation of the hydraulic pump 7.

[0037] Optional, continue to refer to Figure 2 The control valve in the hydraulic walking system for high-altitude operations provided in this embodiment of the invention also includes a damping orifice 37; The damping orifice 37 is located in the return oil branch of the parking brake 5; the damping orifice 37 is used to control the return oil speed of the parking brake 5.

[0038] Specifically, the damping orifice 37 is set on the return oil branch of the parking brake 5 to control the return flow speed of the hydraulic oil in the parking brake 5, thereby improving the smoothness of braking.

[0039] Optional, continue to refer to Figure 2 The control valve in the hydraulic walking system for high-altitude operations provided in this embodiment of the invention also includes a second damping orifice 38, which is connected in parallel to the back pressure check valve 33. The second damping orifice 38 ensures that the pressure in the system circuit can be released when the system is stopped.

[0040] Based on the same inventive concept, embodiments of the present invention also provide an aerial work platform vehicle, including a hydraulic walking system for aerial work as described in any of the above embodiments.

[0041] The aerial work platform provided in this embodiment of the invention can achieve the same technical effect as the hydraulic walking system for aerial work provided in the above-mentioned embodiment of the invention, and will not be described again here.

[0042] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A hydraulic walking system for high-altitude operations, characterized in that, include: The system includes a control handle, a control module, a control valve, a pump motor, a parking brake, and a travel motor; the travel motor includes a first motor and a second motor; the control module includes a first controller and a second controller. The control handle is connected to the input terminal of the first controller, the first output terminal of the first controller is connected to the second controller, and the second output terminal of the first controller is connected to the control valve; the control valve is connected to the travel motor; the parking brake is connected to the control valve, and the parking brake is used to control the whole machine to enter the parking state or release the parking state; The control handle is used to transmit the user's reversing command and throttle command to the first controller. The first controller is used to transmit the reversing command to the control valve to realize the walking reversing of the whole machine. The first controller is used to transmit the throttle command to the second controller. The second controller is connected to the pump motor. The second controller is used to transmit the throttle command to the pump motor. The second controller is used to adjust the speed of the pump motor to control the start, stop, acceleration or deceleration of the whole machine. The control valve is used to control the flow direction of the hydraulic oil and distribute the hydraulic oil to the travel motor and the parking brake.

2. The hydraulic walking system for high-altitude operations according to claim 1, characterized in that, It also includes hydraulic pumps; The first end of the hydraulic pump is connected to the pump motor, the second end of the hydraulic pump is connected to the control valve, and the third end of the hydraulic pump is connected to the oil tank. The hydraulic pump is used to convert the mechanical energy provided by the pump motor into hydraulic energy and transmit it to the control valve.

3. The hydraulic walking system for high-altitude operations according to claim 2, characterized in that, The control valve includes a solenoid valve; The first end of the solenoid valve is connected to the hydraulic pump, the second end of the solenoid valve is connected to the oil inlet of the first motor, the third end of the solenoid valve is connected to the oil return port of the second motor, and the fourth end of the solenoid valve is connected to the oil tank. The solenoid valve is used to control the transmission of hydraulic oil to the oil inlet of the first motor or the oil return port of the second motor.

4. The hydraulic walking system for high-altitude operations according to claim 3, characterized in that, The control valve also includes a balance valve; The first end of the balance valve is connected to the fourth end of the solenoid valve, the second end of the balance valve is connected to the oil tank, and the third end of the balance valve is connected to the first end of the solenoid valve. The balance valve is used to control the transmission speed of the hydraulic oil.

5. The hydraulic walking system for high-altitude operations according to claim 4, characterized in that, The control valve also includes a back pressure check valve and a replenishment check valve; The first end of the back pressure check valve is connected to the second end of the balance valve, and the second end of the back pressure check valve is connected to the oil tank. The back pressure check valve is used to control the transmission of hydraulic oil flowing through the solenoid valve to the replenishment check valve. The first end of the replenishing check valve is connected to the second end of the balance valve, and the second end of the replenishing check valve is connected to the common end of the first motor and the second motor. The replenishing check valve is used to transfer the hydraulic oil to the oil inlet of the second motor.

6. The hydraulic walking system for high-altitude operations according to claim 3, characterized in that, The control valve also includes a main relief valve; The first end of the main relief valve is connected to the first end of the solenoid valve, and the second end of the main relief valve is connected to the oil tank; The main overflow valve is used to control the maximum walking pressure of the entire machine.

7. The hydraulic walking system for high-altitude operations according to claim 3, characterized in that, The control valve also includes a check valve; The first end of the check valve is connected to the hydraulic pump, and the second end of the check valve is connected to the solenoid valve. The one-way valve is used to transmit the hydraulic oil in one direction to the parking brake and the solenoid valve.

8. The hydraulic walking system for high-altitude operations according to claim 3, characterized in that, The control valve also includes a damping orifice; The damping orifice is located in the return oil branch of the parking brake; the damping orifice is used to control the return oil speed of the parking brake.

9. The hydraulic walking system for high-altitude operations according to claim 3, characterized in that, The solenoid valve includes a three-position four-way solenoid directional valve or a three-position six-way solenoid directional valve.

10. An aerial work platform vehicle, characterized in that, Includes a hydraulic walking system for working at height as described in any one of claims 1-9.

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